Lock joint for sectional concrete pipes



Aug. 9, 1932. YEAGER 1,871,398

LOCK JOINT FOR SEGTIONAL CONCRETE PIPES Filed March 10. 1927 PatentedAug. 9, 1932 l UNITED s rsN'roFFic FRANK YEAGER; OF PORT HURON, M IOHIGAN oon JOINT son .SECTIONAL CONGRETEVPIPESF Application filed March 0,1927. Serial No. 174,128.

The present invention pertains to a novel Reference to these views willnow be made joint designed particularly for concrete pipe by use of likecharacters which are employed sections but also useful for pipe sectionsof to designate corresponding parts throughout. other construction. InFigure l is shown a pair of sections 1 The principal object oftheinvention is, the and 2 of similar construction, each comprisx provisionof a device of this character simple ing a'spigot end 3 and a bell end4. The in construction and forming a. sealed mortar sections are joinedby inserting the spigot. chamber after the pipe sections have been ofone into the bell of the other, and the parts drawntogeth'er. The endsof the sections are are locked and sealed by novel means con- 1 10 soformed that the mortar used for sealing stituting the subject matter ofthe invention. purposes is confined inacloscd chamber, with- In, heembodiments shown in Figures 1 out the use of auxiliary parts, so thatit can- 13, the pigo n i s op d a a 5 inwardnot be attackedfrom theoutside or inside yfrom the Outer wall until reaching th of the pipe andfurther cannot breakoff and plgot The remaining end, or the bell 4 1-) dout f place. 7 of the adjacent section which is formed to This noveljoint is. constructed for the r elv' h spigot, is similarly slopedinfurther function of compressing the mortar w rdly asiat 7 from thesame outer wall. as the sections are drawn together. Until These l p r fImed annularly'around the meeting ends come to their final posih W l fhe pipe as clearly shown in tion, the mortar under compression fills theFlgure a cavity, and the excess is ejected. l/Vhen the The h 4 wh h e ivthe spigot 3 of ends reach their final position, the mortar the i e tp pSection is Of l h dep h chamber is closed all around, effectinga comtthe p s 5 nd 7 engage one another r i f th mortar hi h i t remain intheir plane of intersection which, in this therein. i case, obviouslylies in the outer wall of the 7 The peculiar construction enabling thesep p A s ial y riangular cavity is advantages may be applied to the pipin t; thus-formed, as clearlyshown in Figure 1, l t t diff t Ways, ittith and tllQfLlDCtlOn thereof will subsequently spreading of the mortarfrom either the outbe descllhed- 30 id f th i i Case f 11 i or f Intothe wall of each section are inserted th i id f th i i Case f largesizes, longitudinal metallic bars 9 having slots 10 as d i d 1n the endsthereof. The bars are of such 7 The invention is fully disclosed in thefo1- length and the ,Slohs are 9 Positioned that lowing description-andin the accompanying bars of adlaceht ,sechlohs 9 P I 35 d i in which; vr bring the slots thereof 1nto colncidence. The 7' Fi 1 i a l it di lSection partly ends of the bars are embedded in the pipe in elevation,of a pair of pipe sections joined P at the Slots Which are accessibletogether according to the invention; hhhohgh Openings 11 and 12 hthrough the Fig. 2 is an elevation of one of the secsplgot and bell dl'espectlvely of each 40 tions; section.

Fi 3 i a d tcfl In assemblin the-pipe sealing mortar is urea; Sec Ion onh hne 3 placed under the slope 5 and is shaped to i. form a wall diverin from the slo e 5 as f i is secmon on the hne 4 4 of 5 shown in Figure2f Xlso, some mort ar may. I o I I I I I I l l c l V I r or 518 e deal ssmile to 555%? 235 1312 the??? t itii i tith iii: 0 h l showlhg Shghflymodified form of bars 9 thereof arranged as already described, 3 1 3 h wi a and wedge-shaped keys 13are driven through r 1g. 6 1s a detallsection showing the s me the coinciding slots to draw thevpipe sections50 modification in a different plane; 5 together. When the slopes 5 and7 come into 35 inner'wall of the pipe.

45 Wedge-key from the inside,

visions need be made for this arrangement of contact at the outer wallof the pipe, the cavity formed by these slopes is sealed, with theresult that mortar cannot escape there from and further cannot beattacked from the out side. The outer end of the bell abuts the end ofthe adjacent section and thus seals the mortar chamber at this end aswell. The outer diameter of the spigot 3 may be slightly smaller thanthe inner diameter of the bell l so that excess mortar may be squeezedinto The openthe space 14: between these parts. ings 11 and 12 may asobe filled with mortar, if desired, to prevent ke 13 and further toprevent displacement 15 of this member.

Asalso shown in Figure .2,the wall of the pipe is, reinforced by,agrating consisting of spaced rings 15 joined .by obliquely disposedintersecting wires 16. Thebars 9 are woven 30 through .the rings forfirmer support when the sections are assembled as described, the endwires '15- of adjacent members are brought close together to providefurther reinforcement at the joint.

Figure 5 illustrates a modification of the invention wherein the slopedsurfaces are more easily accessible from theinside of the pipe. In thiscase-the extremity of the spigot 20 is sloped ,as at 21 inwardlyofthepipe from the inner, wall thereof. The spigot is surrounded by thebell 22 0f the adjacent pipesection and beneath this bell the wall ofthe same section .is formed with a slope 23 e2:- tending inw-ardly oftat section from the In this case also. the parts are so arrangedthatwhen drawn together by the. wedge-key locking device, the

slopes 21 and 23, will meet at the inner wall,

and the end of the bell 22 will abut the end of the adjacent pipesection.

This type of construction is used in pipes of large diameter wherein theapplieation of the mortar may bemade from the inside. In such cases itis also desirable torlrivethe No special prothe key, the latter merelybeing inserted in the reverse position of that shown i -Figure 1, asindicated by the numeral 25 in Figure-.6.

111 this case also the openings Q'Zand 28 for accommodating the keyand-the overlapped ends of the bars may be filled with mortar ifdesired.

The relation of the sloped end walls to the, 5b spigot and bell is'suchthat these walls may at either the outer wall Thus, the inver s be madeto converge or inne-r wall of the pipe. tion lends itselfto use smallpipes to which mortar mustbeapplied from the outside,as. well as pipessufficiently date a Work-man therein for The mortarphamber is closed atone endby the.. converging slopes andat the other end by; the.

i snrfaceabutment: of the pipe. .ends.v

large to accommo applying the-mortar from the inside.

leakage around the in connection with;

Thus,

the appended claims. e

sloped..clivergingly from one of the surfaces of said surface, said endsbeing adaptedv substantially for mutual contact inthe plane ofconvergence completely closed tween said slopes, 7

sections for drawing said sections together. and-closing said cavity.

cavity may be formed .be-

2. Ajpipe joint comprised of two pipe'is'ec-, sloped tions havingoverlapping ends,

facesformed onthe end of one of the overlapping portions and ontheadjacent part. the other section, said slopes of the end of divergingfrom ,one P P. ends bemg adapted contact-inuthe plane, of convergenceofthe slopes thereof, whereby a .completely. .clo'sed cavity may be andmeans carried by said sections. for draws. ing said sections togetherand cavity.

ofthe surfaces of the .3. A pipe joint comprised. of two .pipe sec-.1tions, oneendofone of the, sections being sloped inwardly. fromonesurface .of said section but not as far as the other surface,

theother pipe section beingadapted toengagethefirst named section atthesurface whereby .a completely closed cavitymay be-formed be-.

from which said slope extends,

tween, the meeting pipe ends, and means. carried bysaid sections.sectlons together and closing sald cavity; I

4. A pipe jolnt comprised of two Pipesections, the meetingends thereofbeing'sloped divergingly from one of thesurfaces ofsaid.

sections but not as far as. the. other surface,

said ends. being adapted substantially. *for:

mutual contact .inthe plane of. convergence of the slopesther.eof,fwhereby a completely closed cavity may be formed slopes, andwedge means adjacent the cavity for drawing said sections together,

5. A pipe joint comprlsed of two pipe sections, one end of one of thesections being inwardly from one. surface of said but not as far as theother surface,

sloped section the other pipe section being adapted to engage the firstnamed sectionat the surface fromwhich said slope extends, whereby acompletely closedcavity may be formed besections'but not as far astheother of the slopes thereof, whereby. a"

and means carried .by said e but not as far asthe other surface, saidsubstantially for mutual formed between said, slopes,

closing said for :drawing said between. said.

tween the meeting pipe ends, and wedge means adjacent the cavity fordrawing said sections together.

6. A pipe joint comprised of two pipe sections, the meeting ends thereofbeing sloped divergingly from one of the surfaces of the sections butnot as far as the other surface, said ends being adapted substantiallyfor mutual contact in the plane of convergence of the slopes thereof,whereby a completely closed cavity may be formed between said slopes,said sections having registering openings at said ends, bars mountedlongitudinally in said sections and overlapping in the space formed bysaid registering openings, said bars being slotted at said openings, anda wedge inserted in the slots of each pair of overlapping bars fordrawing said sections together and closing said cavity.

In testimony whereof I affix my signature.

FRANK YEAGER.

